Check what the result would have been if Sundaram had chosen the numbers shown below.

    Q1. 27

Answers (1)

As we know 

(10a + b) + (10b + a) = 11a + 11b = 11 (a + b)

here a = 2 and b = 7 

27 + 72 = 99= 11 *9 =  a multiple of 11

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